Device for gripping, guiding and transporting wheeled helicopters particularly for ship's decks

Abstract: A device for gripping, guiding and moving wheeled-type helicopters, particularly on board ships, platforms and the like, comprising a pair of crossmembers (6) located parallel to longitudinal axis (X-X) of the vessel and capable of moving transversally to such axis, in engagement with corresponding means of transverse guidance (2) integral with the ship's deck (3), each under the action of appropriate means of operation (7,8a,8'a), independent of one another, and of further means of movement (12,13) parallel to the longitudinal axis of the vessel, in engagement with corresponding longitudinal means of guidance (1), there being also provided a gripping and lifting arrangement (10,100) integral with each crossmember (6) and capable of moving in relation to the latter in order to grip, lift and guide the helicopter after landing, irrespective of its relative position with respect to deck (3) and its orientation with respect to longitudinal axis (X-X) of the vessel, and to position it in alignment with at least one of such longitudinal means of guidance (1).

Description: The object of this invention is an improved device for gripping, guiding and handling wheeled-type helicopters, particularly on board ships, platforms and the like. It is known that the widespread use of shipborne helicopters poses the need to provide for the movement of a helicopter from a landing area located on deck to the interior of a hangar situated on the ship's deck. Such operation is, however, particularly complicated because of numerous factors which determine high unpredictability both of the landing position on the deck and of the relative positions of the helicopter, the said deck and the entrance to the hangar. In addition to this, the manoeuvre should be capable of being performed with absolute safety both for the helicopter and for the crew, even under very hazardous conditions brought about, for example, by high winds and/or heavy seas which cause pitching and rolling of the vessel and upset the balance of the helicopter. There are also known in engineering certain solutions which provide for the use of a wheeled truck placed on deck in a direction substantially parallel to the longitudinal axis of the ship, to which the helicopter should be hitched after landing so that such truck may, by means of suitable arrangements, carry the helicopter to the hangar. Such arrangements, however, display certain disadvantages including the fact that it is particularly difficult, especially under unfavourable weather conditions, for the helicopter to be gripped by the truck when, after landing, the helicopter is in an offset position with its longitudinal axis turned away from the longitudinal axis of the ship. There is also known from publication EP 0 518 405 in the name of the same applicant a device for gripping, handling and transporting helicopters, particularly on board ships, platforms and the like, comprising a pair of gripping components set parallel to the longitudinal axis of the vessel and capable of moving transversally to such axis, in engagement with corresponding means of transverse guidance secured to the deck, and of becoming located in a tilted position, but parallel to one another, in relation to such means of guidance, under the action of means of operation independent of one another. The preamble of claim 1 is based on this document. In other words EP 0 518 405 discloses a device in which a couple of crossmembers are obliged to effect two different and synchronized displacements respectively: a rectilinear translation, along guides transversally located in relation to the longitudinal axis of the vessel, and an angular rotation around their own opposite ends in order to bring the gripping means parallel to the wheels of the helicopter. Such device makes it possible to move the helicopter in the correct position so that it may be subsequently hitched by the truck for the longitudinal journey toward the hangar and are particularly versatile and capable of being used both for helicopters of skid type and for helicopters of wheeled type, but obliges to equip it with unsuitable mechanism, drives and relevant control systems to obtain a correct working of the cross members. There is therefore posed the technical problem of providing a simple and reliable device capable of moving a wheeled-type helicopter from any position within a well-defined landing area on a ship's deck to a position of correct orientation aid alignment in relation to longitudinal guides provided on the deck of the said ship, for subsequent hitching by the truck responsible for transport to the hangar, such operation needing to be made easily feasible and repeatable irrespective of the relative position of the helicopter inside the landing area and in relation to the longitudinal axis of the vessel. Such operation should moreover be capable of being performed automatically and/or manually, but without any operating crew stationed on deck in the vicinity of the landing area. Such results are obtained with the present invention, which provides an improved device for gripping, handling and transporting wheeled-type helicopters, on decks of vessels, platforms and the like, according to claim 1. Further details may be obtained from the following description with reference to the attached drawings, which show: In figure 1 : a schematic plan view of the wheeled helicopter gripping, turning and moving arrangement according to this invention; In figure 2 : a schematic cross-section of the helicopter gripping arrangement with appropriate means of handling; In figure 3a : a plan view of the gripping and lifting component; In figure 3b : a side view of the gripping component shown in fig. 3a; In figures 4a,4b : two alternative examples of implementation of the helicopter gripping and lifting arrangements; In figures 5a,5b,5c : the operational sequence of gripping, turning and alignment of the helicopter; In figure 6 : an alternative example of implementation of the guiding component for the helicopter wheel gripping arrangements. As shown in figure 1, the helicopter gripping and transporting device according to the invention is essentially comprised of a first pair of longitudinal rails 1 and of a second pair of transverse rails 2 made integral with deck 3 of the ship, on which is also located hangar 4 entrances 5 of which are symmetrically aligned to each longitudinal rail 1. Such rails 2 (fig. 3b) are of substantially inverted T section in order to accommodate a corresponding sliding component and prevent disengagement thereof. At each end of the pair of transverse rails 2, which ends substantially coincide with the outer edges of the deck, is provided a crossmember 6 located parallel to longitudinal axis X-X of the vessel, ends 6a of which are made Joined with a truck 7 capable of sliding on the deck in rails 2 to which it is coupled by means of suitable links 7a (fig. 3b) which prevent it from tilting. Trucks 7 are driven by two-way hauling devices of rope type shown in outline at 8 and consisting, in the example, of two cables 8a,8'a, one of which is the driving cable and the other the driven cable, leading via return pulleys 8b,8'b to suitable motor-driven winches, not shown in the figure , and being such as to make it possible to haul in both directions the relevant truck, the rope being always maintained taut. As shown in figs. 3a,3b, with each crossmember 6 is associated a carriage 10, normally located at one of the ends of the said crossmember and sliding on it under the action of suitable means of operation, which are self-evident and therefore not shown in detail. Such carriage 10 has an inverted L component 10a capable of sliding horizontally in relation to the said carriage according to a direction orthogonal to axis X-X of the vessel, under the pushing action exerted by appropriate means, for example flexible means as shown in outline in the figures at 10c. To such component 10a are hinged gripping means 100 consisting of a plate 101 integral with such flange 10a by means of a pin 101a axis of which is orthogonal to the surface of the deck. To plate 101 are made integral two gripping components 102a and 102b, substantially shaped in the form of curved or flat jaws, the first being fixed and capable of sliding on plate 101 parallel to crossmember 6 and the second being capable of entering into engagement with wheels 11 of the helicopter so as to be able to handle the latter as will become more clearly apparent later. In order to cause to be lifted/lowered in a direction orthogonal to the plane of the deck gripping means 100 in relation to carriage 10 there is also provided an arrangement (not shown in the figures) which may for example be comprised of a hydraulic cylinder interposed between inverted L-shaped component 10a and carriage 10 or between component 10a and member 101. Such arrangement comes into operation once the gripping components have engaged helicopter wheels 11 in order to lift them off the surface of the deck. The device according to the invention furthermore provides a longitudinal travelling arrangement for the move into the hangar, substantially consisting of a first truck 12 provided with components 12a to hitch the helicopter and capable of running on idle wheels under the hauling action imparted by a second motor-driven truck 13 linked to the first by a rigid bar 13a. such device being self-evident and therefore shown only in outline in figs. 1 and 5c. Lastly, the device according to the invention provides for each drive to be able to be operated and controlled remotely by the operator either manually or by means of automatic programmes. The operation of the device described with reference to figs. 5a,b,c is as follows: when the helicopter lands on deck 3, within the landing area and with its own longitudinal axis turned away from axis X-X of the vessel, the operator stationed at a distance operates crossmembers 6 which move in parallel until they reach the vicinity of wheels 11, at a preset distance from which the crossmembers are brought to a halt. At this stage is operated the forward movement of carriages 10, each of which moves along appropriate crossmember 6 actuated by its own drive until it is located substantially facing wheel 11, thus causing stoppage of movement of carriage 10 in relation to crossmember 6. At this stage is operated the forward movement of component 10a which places plate 101 in contact with wheel 11, which contact is enhanced by the free rotation of such plate 101 around pin 101a which brings about the effective striking of the plate against wheel 11. When plate 101 strikes against wheel 11 there is brought about the sliding of moving jaw 102b against fixed jaw 102a with consequent gripping of the wheel (fig. 5a). It is therefore obvious that there is thus always ensured the gripping of the wheels of the helicopter even where the latter lands in an offset position with respect to the longitudinal axis of the vessel. When the wheel is gripped by components 102a,102b there is actuated the arrangement for the lifting of gripping means 100 thus bringing about lifting of wheels 11 off the deck. There is therefore operated the movement in reverse direction of carriages 10 thus bringing about the rotation of the helicopter to enable it to be carried with its longitudinal axis parallel to the longitudinal axis of the vessel (fig. 5b). A subsequent combined movement of crossmembers 6 places the helicopter in alignment with the rail 1 corresponding to the preselected hangar (fig. 5c). When the helicopter is correctly positioned there is operated motor-driven truck 13 which places gripping truck 12 under the fuselage of the helicopter so as to be able to actuate arms 12a which lock the helicopter via suitable connections located on the wheel axles. At this stage there occurs the disengagement of gripping crossmembers 6 which return to the starting position, while motor-driven truck 12 tows the helicopter into the hangar. Many variants may be introduced without thereby departing from the scope of the invention as claimed. In particular, as illustrated in figs. 4a and 4b respectively, the components used to grip wheels 11 of the helicopter may be comprised (fig. 4a) of a seat 202 provided in plate 101 and capable of becoming coupled with a corresponding pin 11a projecting coaxially from the hub of wheel 11, or conversely by a pin 302 projecting from plate 101 and capable of becoming coupled with a corresponding seat 11b in wheel 11. As shown in fig. 6, alternative provision is also made for such gripping means 100 to consist of a fixed eye 110a, integral with carriage 10, to which is hinged one end of a connecting rod 110b, the other end of which is hinged via pin 101a to plate 101. Again in this case the operation of the gripping means is alike to that described above, the forward movement of plate 101 toward wheel 11 being capable of being achieved by flexible means 110c (shown in outline in the figures), the pushing action of which is made possible at the time of positioning of crossmember 6 and carriage 10 in relation to wheel 11.

Claims: A device for gripping, guiding and moving wheeled-type helicopters, on decks (3) of vessels, platforms and the like, comprising a pair of crossmembers (6) located and extending parallel to the longitudinal axis (X-X) of the vessel and capable of moving transversally to such axis, in engagement with corresponding means of transverse guidance (2) integral with the deck (3), each under the action of appropriate means of operation (7,8a,8'a) independent of one another, gripping and lifting arrangement (10,100) Joined with each crossmember (6) and consisting of a carriage (10) capable of moving parallel to crossmember (6) under the action of appropriate means, to carriage (10) there being associated, via appropriate means of connection (10a;110a), a plate (101) on which are arranged means (102; 202;302) for gripping helicopter wheels (11), said device further comprising means (12,13) able to move parallel to the longitudinal axis of the vessel, in engagement with corresponding longitudinal means of guidance (1) to tow the helicopter, as well as means of operation and control of the entire device, both manual and automatic, in order to grip, lift and guide the helicopter from the landing area, irrespective of its relative position with respect to deck (3) and its orientation with respect to longitudinal axis (X-X) of the vessel, and to turn it and position it in alignment with at least one of said longitudinal means of guidance (1) for the move to a hangar located on the deck, characterized in the plate (101) being capable of rotating in relation to carriage (10) around an axis perpendicular to the plane of deck (3) for the alignment thereof with helicopter wheels (11) irrespective of their position in relation to longitudinal axis (X-X) of the vessel. A device according to claim 1, characterized in that such crossmembers (6) have their ends Joined with trucks (7) actuated by pairs of ropes (8a,8'a) operated by motor-driven winches. A device according to claim 1, characterized in that such means of transverse (2) and longitudinal (1) guidance are comprised of rails (2) forming an inverted T guide capable of accommodating in a vertical sense a corresponding component (7a) of like section joined with trucks (7,12,13) to prevent tilting thereof during their movement. A device according to claim 1, characterized in that such means of connection of plate (101) to carriage (10) are comprised of an inverted L component (10a) moving horizontally in relation to carriage (10) in a direction perpendicular to axis X-X, to which is hinged plate (101) by means of a pin (101a), the movement of component (10a) being brought about by the controllable action of appropriate pushing means (10c). A device according to claim 1, characterized in that such means of connection of plate (101) to carriage (10) are comprised of a fixed eye (110a) to which is hinged one end of a connecting rod (110b), to the other end of which is hinged plate (101) via pin (101a), the movement of rod (110b) with respect to carriage (10) being brought about by the controllable action of appropriate pushing means (110c). A device according to the previous claims, characterized in that such means for lifting wheel (11) off the surface of the deck are substantially comprised of means interposed between carriage (10) and gripping means (100) and capable of bringing about the lifting of the latter in relation to the said carriage. A device according to claims 1 and 6, characterized in that such lifting means are comprised of a hydraulic cylinder interposed between carriage (10) and inverted L-shaped component. A device according to claims 1 and 6, characterized in that such lifting means are comprised of a hydraulic cylinder interposed between inverted L-shaped component (10a) and plate (101). A device according to claim 1, characterized in that such gripping means consist of two jaws, one of which (102a) is fixed and the other (102b) is capable of being moved parallel to guide (101). A device according to claim 1, characterized in that such gripping means consist of a seat (202) provided in guide (101) and capable of becoming coupled to a corresponding pin (11a) projecting coaxially from the hub of helicopter wheel (11). A device according to claim 1, characterized in that such gripping means consist of a pin (302) projecting from guide (101) and capable of becoming coupled with a corresponding seat (11b) provided coaxially in the hub of wheel (11). A device according to claim 1, characterized in that such means of gripping and longitudinal movement of the helicopter are preferably comprised of a pair of trucks, one of which is motor-driven (13) and made joined by rigid articulated means (13a) with a second idle truck (12) capable of being placed under the fuselage of the helicopter and equipped with means for locking and lifting the said helicopter.

Inventors: ORTELLI AURELIO, ORTELLI, AURELIO
Applicants: RIVA CALZONI SPA, RIVA CALZONI S.P.A.
Application year: 1994
Main classification: B64F1
IPC codes: B64F1